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[187.189.51.144]) by smtp.gmail.com with ESMTPSA id v23sm2516474ots.63.2021.03.09.08.21.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Mar 2021 08:21:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=X5qNtlKyR3HiK96NPS7iXZ0SUIEgp+QlNj8LO8hQyAM=; b=N+YLCFKuHpHa80yDhQmA/0pb8QkwdYp1OMdY5f/Tiia43E513T517vthrv9htKFlrn GLVqAIDJ7O/WyIDcTb9eesnxX8Ou0wjjrBJ8LxxVn7wCnOtI+I6E543JnLDmBowl7HYk q0iXmgT6fYryCkgxKZ2ojymvRJX40HBKc5r0pExTr3ZyZug2ef2zUM9p2aPzuHWM6EWC AgVKkpYX7ueP0NFeuqCzrEZLXm4dRVscHvzkTJaygtOg0FRId+d1F8Yp/9FBcatk5L6B s4F0tVgPswCIkq0++LB5nMosSmLhJvdeH4LiJcc6ksdAo36sNIV1P0xRXw6272V3ixt6 wWMg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=X5qNtlKyR3HiK96NPS7iXZ0SUIEgp+QlNj8LO8hQyAM=; b=auUu1Vej1n9guqIQ+SCkpA76eoWpWcDwE66c0rlwjWwSY0ya8lacv3nlkBlKIFTIVF kAudfBmBOR/2FF5xJA/Chs7BJaa3hQVAkaMyB8eFpgLyobNJszMsHml4DjhmQ0N3lb06 GU2L7h/0OChaBbPWwjR7dzDVy+x3BpP3RUh6yymOG850YNdUFNhoou0cWVCJj04vd2Zd UmbryTXZkFj/RMonYIrTfc0C7p/V49zjHGbDzS4f4rzKI6biXaJQzxSPSVZnOJI2O3y3 Xx5v2ENwL/9kssrEm4aSVRzP6AA0la5fYimklKdLt5/4OVvIijcmXreuBvz61AUKf6+G R7KA== X-Gm-Message-State: AOAM533oLPFOKUwbIemVE6V2FfdgQLBw5935vEMBzePYyvHwklMF4SeS 8hRMmz1Rp465sjRGjuOobjwVmZULLufW7Ym0 X-Google-Smtp-Source: ABdhPJxYsM3+LW7w7XtTP+T/HZQa9HtVg3QdMxd5ngYJ6ppOsWHGk4r0X8XiErFSuNPNFDbHNWQMMQ== X-Received: by 2002:a05:6830:8f:: with SMTP id a15mr2285756oto.299.1615306877007; Tue, 09 Mar 2021 08:21:17 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v4 30/78] target/arm: Implement SVE2 WHILEGT, WHILEGE, WHILEHI, WHILEHS Date: Tue, 9 Mar 2021 08:19:53 -0800 Message-Id: <20210309162041.23124-31-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210309162041.23124-1-richard.henderson@linaro.org> References: <20210309162041.23124-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::32a; envelope-from=richard.henderson@linaro.org; helo=mail-ot1-x32a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org, alex.bennee@linaro.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" Rename the existing sve_while (less-than) helper to sve_whilel to make room for a new sve_whileg helper for greater-than. Signed-off-by: Richard Henderson --- v2: Use a new helper function to implement this. v4: Update for PREDDESC. --- target/arm/helper-sve.h | 3 +- target/arm/sve.decode | 2 +- target/arm/sve_helper.c | 38 +++++++++++++++++++++++++- target/arm/translate-sve.c | 56 ++++++++++++++++++++++++++++---------- 4 files changed, 82 insertions(+), 17 deletions(-) diff --git a/target/arm/helper-sve.h b/target/arm/helper-sve.h index 1c7fe8e417..5bf9fdc7a3 100644 --- a/target/arm/helper-sve.h +++ b/target/arm/helper-sve.h @@ -913,7 +913,8 @@ DEF_HELPER_FLAGS_4(sve_brkns, TCG_CALL_NO_RWG, i32, ptr= , ptr, ptr, i32) =20 DEF_HELPER_FLAGS_3(sve_cntp, TCG_CALL_NO_RWG, i64, ptr, ptr, i32) =20 -DEF_HELPER_FLAGS_3(sve_while, TCG_CALL_NO_RWG, i32, ptr, i32, i32) +DEF_HELPER_FLAGS_3(sve_whilel, TCG_CALL_NO_RWG, i32, ptr, i32, i32) +DEF_HELPER_FLAGS_3(sve_whileg, TCG_CALL_NO_RWG, i32, ptr, i32, i32) =20 DEF_HELPER_FLAGS_4(sve_subri_b, TCG_CALL_NO_RWG, void, ptr, ptr, i64, i32) DEF_HELPER_FLAGS_4(sve_subri_h, TCG_CALL_NO_RWG, void, ptr, ptr, i64, i32) diff --git a/target/arm/sve.decode b/target/arm/sve.decode index 0674464695..ae853d21f2 100644 --- a/target/arm/sve.decode +++ b/target/arm/sve.decode @@ -700,7 +700,7 @@ SINCDECP_z 00100101 .. 1010 d:1 u:1 10000 00 .... = ..... @incdec2_pred CTERM 00100101 1 sf:1 1 rm:5 001000 rn:5 ne:1 0000 =20 # SVE integer compare scalar count and limit -WHILE 00100101 esz:2 1 rm:5 000 sf:1 u:1 1 rn:5 eq:1 rd:4 +WHILE 00100101 esz:2 1 rm:5 000 sf:1 u:1 lt:1 rn:5 eq:1 rd:4 =20 ### SVE Integer Wide Immediate - Unpredicated Group =20 diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c index 4b487d6f5f..700112e6cb 100644 --- a/target/arm/sve_helper.c +++ b/target/arm/sve_helper.c @@ -3745,7 +3745,7 @@ uint64_t HELPER(sve_cntp)(void *vn, void *vg, uint32_= t pred_desc) return sum; } =20 -uint32_t HELPER(sve_while)(void *vd, uint32_t count, uint32_t pred_desc) +uint32_t HELPER(sve_whilel)(void *vd, uint32_t count, uint32_t pred_desc) { intptr_t oprsz =3D FIELD_EX32(pred_desc, PREDDESC, OPRSZ); intptr_t esz =3D FIELD_EX32(pred_desc, PREDDESC, ESZ); @@ -3771,6 +3771,42 @@ uint32_t HELPER(sve_while)(void *vd, uint32_t count,= uint32_t pred_desc) return predtest_ones(d, oprsz, esz_mask); } =20 +uint32_t HELPER(sve_whileg)(void *vd, uint32_t count, uint32_t pred_desc) +{ + intptr_t oprsz =3D FIELD_EX32(pred_desc, PREDDESC, OPRSZ); + intptr_t esz =3D FIELD_EX32(pred_desc, PREDDESC, ESZ); + uint64_t esz_mask =3D pred_esz_masks[esz]; + ARMPredicateReg *d =3D vd; + intptr_t i, invcount, oprbits; + uint64_t bits; + + if (count =3D=3D 0) { + return do_zero(d, oprsz); + } + + oprbits =3D oprsz * 8; + tcg_debug_assert(count <=3D oprbits); + + bits =3D esz_mask; + if (oprbits & 63) { + bits &=3D MAKE_64BIT_MASK(0, oprbits & 63); + } + + invcount =3D oprbits - count; + for (i =3D (oprsz - 1) / 8; i > invcount / 64; --i) { + d->p[i] =3D bits; + bits =3D esz_mask; + } + + d->p[i] =3D bits & MAKE_64BIT_MASK(invcount & 63, 64); + + while (--i >=3D 0) { + d->p[i] =3D 0; + } + + return predtest_ones(d, oprsz, esz_mask); +} + /* Recursive reduction on a function; * C.f. the ARM ARM function ReducePredicated. * diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c index 5380ed26c1..f833bd5e33 100644 --- a/target/arm/translate-sve.c +++ b/target/arm/translate-sve.c @@ -3112,7 +3112,14 @@ static bool trans_WHILE(DisasContext *s, arg_WHILE *= a) unsigned vsz =3D vec_full_reg_size(s); unsigned desc =3D 0; TCGCond cond; + uint64_t maxval; + /* Note that GE/HS has a->eq =3D=3D 0 and GT/HI has a->eq =3D=3D 1. */ + bool eq =3D a->eq =3D=3D a->lt; =20 + /* The greater-than conditions are all SVE2. */ + if (!a->lt && !dc_isar_feature(aa64_sve2, s)) { + return false; + } if (!sve_access_check(s)) { return true; } @@ -3135,22 +3142,42 @@ static bool trans_WHILE(DisasContext *s, arg_WHILE = *a) */ t0 =3D tcg_temp_new_i64(); t1 =3D tcg_temp_new_i64(); - tcg_gen_sub_i64(t0, op1, op0); + + if (a->lt) { + tcg_gen_sub_i64(t0, op1, op0); + if (a->u) { + maxval =3D a->sf ? UINT64_MAX : UINT32_MAX; + cond =3D eq ? TCG_COND_LEU : TCG_COND_LTU; + } else { + maxval =3D a->sf ? INT64_MAX : INT32_MAX; + cond =3D eq ? TCG_COND_LE : TCG_COND_LT; + } + } else { + tcg_gen_sub_i64(t0, op0, op1); + if (a->u) { + maxval =3D 0; + cond =3D eq ? TCG_COND_GEU : TCG_COND_GTU; + } else { + maxval =3D a->sf ? INT64_MIN : INT32_MIN; + cond =3D eq ? TCG_COND_GE : TCG_COND_GT; + } + } =20 tmax =3D tcg_const_i64(vsz >> a->esz); - if (a->eq) { + if (eq) { /* Equality means one more iteration. */ tcg_gen_addi_i64(t0, t0, 1); =20 - /* If op1 is max (un)signed integer (and the only time the addition - * above could overflow), then we produce an all-true predicate by - * setting the count to the vector length. This is because the - * pseudocode is described as an increment + compare loop, and the - * max integer would always compare true. + /* + * For the less-than while, if op1 is maxval (and the only time + * the addition above could overflow), then we produce an all-true + * predicate by setting the count to the vector length. This is + * because the pseudocode is described as an increment + compare + * loop, and the maximum integer would always compare true. + * Similarly, the greater-than while has the same issue with the + * minimum integer due to the decrement + compare loop. */ - tcg_gen_movi_i64(t1, (a->sf - ? (a->u ? UINT64_MAX : INT64_MAX) - : (a->u ? UINT32_MAX : INT32_MAX))); + tcg_gen_movi_i64(t1, maxval); tcg_gen_movcond_i64(TCG_COND_EQ, t0, op1, t1, tmax, t0); } =20 @@ -3159,9 +3186,6 @@ static bool trans_WHILE(DisasContext *s, arg_WHILE *a) tcg_temp_free_i64(tmax); =20 /* Set the count to zero if the condition is false. */ - cond =3D (a->u - ? (a->eq ? TCG_COND_LEU : TCG_COND_LTU) - : (a->eq ? TCG_COND_LE : TCG_COND_LT)); tcg_gen_movi_i64(t1, 0); tcg_gen_movcond_i64(cond, t0, op0, op1, t0, t1); tcg_temp_free_i64(t1); @@ -3181,7 +3205,11 @@ static bool trans_WHILE(DisasContext *s, arg_WHILE *= a) ptr =3D tcg_temp_new_ptr(); tcg_gen_addi_ptr(ptr, cpu_env, pred_full_reg_offset(s, a->rd)); =20 - gen_helper_sve_while(t2, ptr, t2, t3); + if (a->lt) { + gen_helper_sve_whilel(t2, ptr, t2, t3); + } else { + gen_helper_sve_whileg(t2, ptr, t2, t3); + } do_pred_flags(t2); =20 tcg_temp_free_ptr(ptr); --=20 2.25.1